1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697c88df0b3c7037039bfdf2f6df862de20b301f354736f495c8be7e6e4ab4f3. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe63649-fb21-4356-a4b9-b30ea99476b3.json and https://artists.proofprofile.net/proofs/artist/4fe63649-fb21-4356-a4b9-b30ea99476b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
it was different this time (we can't do this anymore)